Frobenius, L. (1913). The voice of Africa: Being an account of the travels of the german inner african exploration expedition in the years 1910, 1912 (2a. ed.). Hutchinson & Co.
Citace podle Chicago (17th ed.)Frobenius, Leo. The Voice of Africa: Being an Account of the Travels of the German Inner African Exploration Expedition in the Years 1910, 1912. 2a. ed. Londres: Hutchinson & Co, 1913.
Citace podle MLA (9th ed.)Frobenius, Leo. The Voice of Africa: Being an Account of the Travels of the German Inner African Exploration Expedition in the Years 1910, 1912. 2a. ed. Hutchinson & Co, 1913.
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